Sewing-machine.



PATENTED JULY 10, 1906. A. A. MACKENZIE. SEWING MACHINE. APPLICATION FILED MAR .11. 1905.

5 SHEETSSHBBT 1.

fltdrxirfllexandalmwm x No. 825,741. PATENT-ED JULY 10, 1906. A. A. MACKENZIE.

SEWING MACHINE.

APPLICATION FILED MAB.1 1.19Q5.

5 SHEETS-SHEET 4.

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SEWING-MACHINE.

Specification of Letters Patent.

Patented July 10, 1906.

Application filed March 1]., 1905. Serial No. 249,551.

To all whom it may concern.-

Be it known that 1, ANDREW ALEXANDER MACKENZIE, a subject of the King of Great Britain, residing at 144 Dunluce avenue, Belfast, Ireland, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

This invention relatesv to sewing-machines and it has for its object to enable two or more rows of hemstitching or other stitching to be performed at one operation on the ma- In carrying out the invention for the pur pose of hemstitching, for instance, two handerohiefs simultaneously it is necessary to have two needles, with their spears or punches, two folders, and two shuttles, with double presser-feet and feed-gears.

On the annexed drawings I have shown, by way of illustration or example, a convenient method of carrying out the invention in connection with a Wheeler &- Wilson sewingmachine, the machine. being adapted to hemstitch two handkerchiefs simultaneously. Of course the invention can also be adapted to the Singer and other machines having r0- tary hooks or shuttles. Y

Figure 1 shows in side view part of the arm A and table E of a sewing-machine with my hemstitching attachment applied thereto. Fig. 2 is a front or end view of Fig. 1, showing the table in section. Fig. 3 is a plan view of the double folder. Figs. 4 and 5 are respectively side and back views showing the adjustment for the presser-feet. Figs. 6 and ,7 are respectively a sectional side view and an end view showing the adjustment for the shuttles. Fig. 8 is a front view showing the needle and punch adjustments, while Fig. 9 is a vertical section through the needleadjustment and Fig. 10 a vertical section through the punch adjustment. Fig. 11 shows an arrangement for four rows of hemstitching.

On the drawings the same reference-letters wherever repeated indicate the same parts.

A represents a'portion of thearm, and B the head, of an ordinary Vheeler &iVilson or like sewing-machine. C is the needle-bar; D, the bar for the presser-foot; E, the table of the machine; F, the shaft for rotating the shuttles, and G the feed-shaft. These parts of the machine may be made and operated in theusual manner. tion I attach to the ordinary needle bar C a cross-bar a, which I may term a subneedlebar, and this bar is provided at each end with a needle (or needles) and a spear or punch, (or spears or punches.) Preferably I fit at a suitable distance from one another and at each end of the subncdle-bar two blocks 6 and c, and each block b is capable of provided with two of the usual punches or.

spears e, arranged one at each side of the needle (Z. (See also Figs. 8, 9, and 10.) r i The bar D has at its lower end a cross-bar f, provided with presser-feet g g, which are arranged in proper relation to the needles.

There are two shuttles,one in each shuttle-box h 71., and they are rotated, as usual, by means of bevel-gears 'i i y" from the shaft F. There is a double feed, the one feed being arranged in the ordinary manner below the right-hand presser-foot g (see Fig. 1) and the other being arranged below the left-hand presserfoot g. The left-hand feed 76 is made much the same as usual and operated by means of the element is and arm k in the usual manner. The other feed is similarly operated.

The needles are vibrated by means of the rods Z Z, which pass freely through holes in rotatable rings m m on the rocking lever n, pivoted at 0 to the head B. This lever 17. is rocked by means of the connecting-rod from the vibrating quadrant q, as usua By adjusting the slide-block q in the quad rant the lateral throw of the needles can be varied as desired, as will be well understood.

There are two folders r 1" arranged side by side on the table of the machine. Theymay be fixed in position by means of screws 8. The left-hand folder 7' (see Fig. 1) may. be made in the same manner as an ordinary W'heeler & Wilson folder; but the right hand folder 1* has to be made different, as it has to In carrying out my invenfold the opposite way. The construction of the double folder will be hereinafter referred to. It is evident that with this machine two handkerchiefs or such like can be folded by 30 the screws'j v the folders and then fed through the machine and hemstitched simultaneously. The hem on the handkerchiefs would be folded over in op ositeways, as 'shown at Fig. .3, and 5 both handkerchiefs would travel along and be ewed at the same time by means of the double sets of needles.

It is very desirable to have means whereby the distance apartof the two rows of-hem- 1c stitching can be varied so as to suit difi erent kinds of articles being sewed; In order that this may be done, I make the needles, the punches, the resser-feet, the feed, the shuttles,. and their bevel driving-wheels t y" all r 5 adjustable! .In the case bf the Wheels 1' j, I

fit them' slidably on the shaft 'F, and they can; be elarnpedin any adjusted position on the shaft by" means of the pinching-screws 11 9' Inthe case of the shuttles, the shuttle- I boxes h" h, with their driving-spindles and ;.-gear-wheels t j, are'carried bybridge-pieces 3' as usual, '(see Figs. Sand 7,) and these bridgepieces are made with slots 7', through which the fastening-screws 7' are passed and inserted in the supports 9' at the underside of the table'E. Onslackening'the screws f-the shuttles can be adjusted laterally to the eX tent. permitted by the slots y" and' then be clamped in-position again by tightening up The feed-plates, with their 00-. operating parts, are arranged so that they can move laterally in slots in the table of the machine] To adjust them: laterally,- theelements k. are shifted along the feed-shaft G and the arms k (thereis one for each feedgear) are shifted 'aldng the rock-shaft 6, On slackening the-screws k and k it will be easily seen that the parts k W, with theirfeedmechanism, can be adjusted and when no adjusted canbe clamped again in position bytightening up thescrews. The needles and punches can be adjusted by making the bar-a, with slots 0, (t at each end, and in these slots the blocks c are slidably fitted in the man 1 5 nershown atFigs. 8,9, and- -l0. It will be seen from Fig. 9- thateach block b has its pivot screw-pin 6 passed through the slot and fastened by means of a washer b and nut 6 On slackening the nut the block can be v 59' slid along the bar a/and then clamped in the new position by tightening up the nut.

I Likewiseeach punch-block c has'its screw 0 passed through the slot and then-tightened I up, so as to hold it in the adjusted position, as

shown at Fig. 10 The Presser-feet are ad-.

v .ju'stablyfitted on the bar fby securing each v 1 I 'presser-foot toa bracket t,.wh ich is provided with arms 'u slotted at u u". Screws 1! are passed through the slots into. the bar f, and

, 60 of course on slackening the screws the bracket can be adjusted on the bar f to the n represents washers. a

As before stated, the'folder r is made much extent permitted by the length of the slots u.f.

6 1116 same as. the usual Wheeler '81; Wilson folder, and there is an additional folder T, which is made in the same manner as the folder 1', but the parts are reversed. The one folder folds the right-hand handkerchief v and the other. the left-hand handkerchief 12.

(See Fig. 3".) Both folders are secured by the usual screws w w to a T-plate :20, which is fastened by the screws s to the table E.

In the arrangement shown 'atiFig. 11 for doing four rows of hemstitching simultaneously all the parts are, merely duplicated.

There are two connectingrods p p, which operate the rods Z Z Z Z by means of the rocking levers n n, having rings m m m m There are two needle-blocks b b and punch- .blocks a c at each end of the bar afand all these blocks are adjustable in the slots a a.

There are four resser-feet g g g 9 and these I are adjustably fitted onrthe bar-f. There are four shuttles. or hooks, and these are driven by four gears t t j 1 from the shaft F. There are also four feeds 7c 7c 70 k It'is evident that with this arrangement four distinct rows of hemstitching. or open-work stitching can be performed at once either on a single article or two rows on each-of two articles, or the parts may be arranged so as to do a singlerow of stitching on four separate aticles.

The invention can be applied for stitching handkerchiefs and v other articles, and to stitch two or more separate articles at a time or make two or more rows of stitching on a single article. The twin folderis of'coiirse only used when hemming two' articlessihillltaneously.

Having now-fully described my invention, whatl claim, and des" e to secure by Letters hatent, is

1 1. In a sewing-machine, the combinati on with the needle-bar-of a-slotted cross-bar at the bottom thereof, needle-blocks, a pivotpinin each block,'means for clamping the. I

pivot-pins to the crossbar, and a screw inserted in each pivot-pm.

2. Ina sewing-machine; the combination with the needle-bar of a slotted cross-bar at the bottom thereof, needle-blocks, pivotpins in said blocks having reduced ends which enter the slots of the slotted bar, nuts for se curing the pins, screws, inserted in the pins and means for vibrating the needle-blocks, substantially as described. w

3. In a sewin -machine, the combination with the needlear, of a cross-bar withtwo 120.- carrying block sfitted adjustably in each slot of the bar, a punch-carrying block fitted 'ad- .1

slots thereinat the bottom thereof, a needlejustably in each slot of the bar, and means as described.

the slots of the slottedicross-bar, substantially as described.

5. In a sewing-machine, the combination With the needle-bar of a slotted cross-bar at 5 the bottom thereof, a presser-bar, a cross-bar at the bottom of said resser-bar, pr'esserfeet fitted adjustablj to this cross-bar,-'needle-carrying blocks and punch-blocks, substantially as described. '10. 6. In a sewin machine, the combination @With the needlear of a slotted cross-bar at the bottom thereof,'a resser-bar, a cross-bar at the bottom of said resser-bar, presserfeet, brackets for the feet; slotted cross-bars r 5 on the brackets, means for securin said slotted cross-bars to the cross-bar of t e presserbar, and needle-carrying blocks, substantially as described.

7. In a sewinmachine, the combination 20 with the needlear of a slotted cross-bar at the bottom thereof, a presser-bar, a cross-bar at the bottom of said presser-bar', adjustable shuttles, adjustable feedmechanism, adjustable needle-carrying blocks and adjustable punchblocks, substantially as described. 25 8. In a sewin -macl 1jne, the combination with the needlear of a slotted cross-bar at the bottom thereof, a resser-bar, a cross-bar at the bottom of said resser-bar, adjust able shuttles, adjustable feed mechanisms, ad- 0 justable needle-carrying blocks, adjustable punch-blocks, -and folders arranged side by side and removably secured to the machine table, substantially as described. v

In testimony whereof I affix my signature 3 5 in presence of two witnesses.

ANDREW ALEXANDER MACKENZIE: Witnesses:

,J ME's Basr,

ROBERT W. GRIBBoN; 

